48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package gemini
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"crypto/x509/pkix"
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"math/big"
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"time"
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)
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// GenX509KeyPair generates a TLS keypair with one week validity.
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func GenX509KeyPair(host string) (tls.Certificate, error) {
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now := time.Now()
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template := &x509.Certificate{
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SerialNumber: big.NewInt(now.Unix()),
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Subject: pkix.Name{
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CommonName: host,
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Organization: []string{host},
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},
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NotBefore: now,
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NotAfter: now.AddDate(0, 0, 7),
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BasicConstraintsValid: true,
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IsCA: true,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
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KeyUsage: x509.KeyUsageKeyEncipherment |
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x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
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}
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priv, err := rsa.GenerateKey(rand.Reader, 2048)
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if err != nil {
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return tls.Certificate{}, err
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}
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cert, err := x509.CreateCertificate(rand.Reader, template, template,
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priv.Public(), priv)
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if err != nil {
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return tls.Certificate{}, err
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}
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var out tls.Certificate
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out.Certificate = append(out.Certificate, cert)
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out.PrivateKey = priv
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return out, nil
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}
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